CN104452835A - Test device for transmission line foundation test and setting method thereof - Google Patents

Test device for transmission line foundation test and setting method thereof Download PDF

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CN104452835A
CN104452835A CN201410740963.5A CN201410740963A CN104452835A CN 104452835 A CN104452835 A CN 104452835A CN 201410740963 A CN201410740963 A CN 201410740963A CN 104452835 A CN104452835 A CN 104452835A
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organic glass
preformation
plexiglass
cushion cap
stake
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CN104452835B (en
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董梅
李鹏
朱立位
张大长
宋林辉
张真卿
吴昊
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Lianyungang Zhiyuan Electric Power Design Co ltd
State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nanjing Tech University
Lianyungang Power Supply Co of Jiangsu Electric Power Co
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Nanjing Tech University
Lianyungang Power Supply Co of Jiangsu Electric Power Co
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D33/00Testing foundations or foundation structures

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  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
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Abstract

本发明公开了一种用于输电线路基础试验的试验装置及其设置方法,本发明的有机玻璃桩采用自中间向两个方向对称进行的顺序逐根压入土中,不仅有效地模拟了实际施工现场逐根打桩的程序,而且可有效避免土朝一个方向挤压而导致土壤挤压不均匀或土壤受到严重挤压使先压入的模型桩倾斜,使得试验结果更加精确;而有机玻璃桩逐根压入后,再与模型承台组装,而后注入氯仿使之相连,这种方法简单便捷,可以有效避免群桩同时压入耗时大、耗力大等难题;且有机玻璃模型组件通过氯仿充分固结在一起,可用于上拔、下压两种试验。

The invention discloses a test device and its setting method for the foundation test of a power transmission line. The plexiglass piles of the invention are pressed into the soil one by one in a symmetrical order from the middle to two directions, which not only effectively simulates the actual construction The program of piling one by one on site can effectively prevent the soil from being squeezed in one direction to cause uneven soil extrusion or the soil is severely squeezed so that the first pressed model pile is tilted, making the test results more accurate; while the plexiglass pile is gradually After the roots are pressed in, they are assembled with the model cap, and then injected with chloroform to connect them. This method is simple and convenient, and can effectively avoid the time-consuming and labor-intensive problems of simultaneously pressing in groups of piles; and the plexiglass model components are passed through chloroform Fully consolidated together, it can be used for both pull-up and push-down tests.

Description

用于输电线路基础试验的试验装置及其设置方法Test device and setting method for foundation test of transmission line

技术领域technical field

本发明属于岩土工程群桩基础模型试验技术领域,特别是一种用于输电线路基础试验的试验装置及其设置方法。The invention belongs to the technical field of pile group foundation model tests in geotechnical engineering, in particular to a test device and a setting method for foundation tests of power transmission lines.

背景技术Background technique

群桩基础是建筑工程的重要内容,试验研究是研究群桩基础的重要方法。由于开展现场真型试验比较困难且代价昂贵,而大比例尺的群桩模型模拟试验既可以模拟现场应力场,研究地基基础的变形和失稳机理,又易于开展、相对造价较低,因此群桩基础模型试验具有重要意义。Pile group foundation is an important content of construction engineering, and experimental research is an important method to study pile group foundation. Since it is difficult and expensive to carry out field tests, the large-scale pile group model simulation test can not only simulate the field stress field, study the deformation and instability mechanism of the foundation, but also be easy to carry out and relatively low in cost. Basic model tests are of great significance.

一般地基基础模型试验采用先组装好群桩模型,然后压入土中,此方法运用于群桩基础试验时则会产生较大难度。群桩模型同时压入的耗时、耗力很大,更可能有无法完全压入的情况出现。而且,大量桩模型同时压入会让土壤受到严重挤压造成桩模型倾斜,这会造成桩模型受力不均匀、实验结果不精确等不利情况出现。In general foundation model tests, the pile group model is first assembled and then pressed into the soil. This method will cause greater difficulty when applied to the pile group foundation test. Simultaneous pressing of pile group models is time-consuming and labor-intensive, and it is even more likely that they cannot be completely pressed in. Moreover, pressing in a large number of pile models at the same time will cause the soil to be severely squeezed and cause the pile models to tilt, which will cause unfavorable situations such as uneven stress on the pile models and inaccurate experimental results.

由于上述多种问题的存在,进行群桩基础模型试验时,现有的试验方法会造成试验操作繁琐,结果精度不高。所以,寻找一种有效体现实际施工且适用于现有群桩模型试验的新方法很有必要。Due to the existence of the above-mentioned various problems, the existing test methods will cause cumbersome test operations and low accuracy of results when carrying out model tests of pile group foundations. Therefore, it is necessary to find a new method that effectively reflects the actual construction and is suitable for the existing pile group model test.

发明内容Contents of the invention

本发明的目的在于提供一种操作简便、结果精确的用于输电线路基础试验的试验装置及其设置方法。The object of the present invention is to provide a test device and its setting method for the basic test of transmission lines with simple operation and accurate results.

实现本发明目的的技术解决方案为:The technical solution that realizes the object of the present invention is:

一种用于输电线路基础试验的试验装置,包括有机玻璃承台、有机玻璃桩和有机玻璃立柱;有机玻璃承台的下端面上设置有与有机玻璃桩直径配合的预成桩孔,预成桩孔与机玻璃承台的上端面通过预成小孔连通,机玻璃承台的上端面设置有与机玻璃立柱直径配合的预成立柱孔,有机玻璃桩与预成桩孔通过从预成小孔注入的氯仿固连,机玻璃立柱与预成立柱孔通过氯仿固连。A test device for the foundation test of transmission lines, including a plexiglass cap, a plexiglass pile and a plexiglass column; the lower end surface of the plexiglass cap is provided with a prefabricated pile hole matching the diameter of the plexiglass pile, and the prefabricated The pile hole is connected with the upper end surface of the organic glass cap through a preformed small hole. The chloroform injected into the small hole is fixedly connected, and the organic glass column and the pre-established column hole are fixedly connected by chloroform.

一种用于输电线路有机玻璃群桩基础试验试验装置的设置方法,包括以下步骤:A method for setting up a testing device for a plexiglass pile group foundation test of a power transmission line, comprising the following steps:

步骤一:在模型箱中的泥土表面根据有机玻璃承台的位置和有机玻璃承台下端面设置的与有机玻璃桩直径配合的预成桩孔的间距确定有机玻璃桩的具体位置,然后采用自中间向两个方向对称进行的顺序将有机玻璃桩逐根压入泥土中,并预留与预成桩孔深度相同的长度在泥土外;Step 1: Determine the specific position of the plexiglass pile on the soil surface in the model box according to the position of the plexiglass cap and the distance between the prefabricated pile holes set on the lower end of the plexiglass cap and the diameter of the plexiglass pile, and then use the automatic Press the plexiglass piles into the soil one by one in a symmetrical order in two directions in the middle, and reserve the same length as the depth of the prefabricated pile holes outside the soil;

步骤二:全部有机玻璃桩压入后,将有机玻璃桩预留在泥土外的部分与机玻璃承台下端面的预成桩孔对应组装;Step 2: After all the plexiglass piles are pressed in, assemble the part of the plexiglass piles outside the soil corresponding to the preformed pile holes on the lower end surface of the plexiglass cap;

步骤三:通过有机玻璃承台上连通预成桩孔和有机玻璃承台上端面的预成小孔注入氯仿,让有机玻璃桩与有机玻璃承台完全反应并固结成一整体;Step 3: Inject chloroform through the pre-formed small hole connecting the pre-formed pile hole on the plexiglass cap and the pre-formed hole on the upper end of the plexiglass cap, so that the plexiglass pile and the plexiglass cap completely react and consolidate into a whole;

步骤四:在有机玻璃承台上端面开有的预成立柱孔内注入氯仿,并快速将有机玻璃立柱置于预成立柱孔内,让有机玻璃立柱与有机玻璃承台完全反应并固结成一整体;Step 4: Inject chloroform into the pre-established column hole on the upper end of the plexiglass cap, and quickly place the plexiglass column in the pre-established column hole, so that the plexiglass column and the plexiglass cap completely react and consolidate into one overall;

步骤五:在有机玻璃承台下表面和泥土之间的空隙处注入泥浆,泥浆必须充实在整个空隙内,使有机玻璃承台和泥土产生有效的接触面积。Step 5: Inject mud into the gap between the lower surface of the plexiglass cap and the soil. The mud must be filled in the entire gap so that the plexiglass cap and the soil have an effective contact area.

本发明与现有技术相比,其显著优点:Compared with the prior art, the present invention has significant advantages:

(1)本发明的有机玻璃桩采用自中间向两个方向对称进行的顺序逐根压入土中,不仅有效地模拟了实际施工现场逐根打桩的程序,而且可有效避免土朝一个方向挤压而导致土壤挤压不均匀或土壤受到严重挤压使先压入的模型桩倾斜,使得试验结果更加精确。(1) The plexiglass piles of the present invention are pressed into the soil one by one in a symmetrical order from the middle to two directions, which not only effectively simulates the procedure of piling one by one in the actual construction site, but also effectively prevents the soil from being squeezed in one direction If the soil is squeezed unevenly or the soil is severely squeezed, the model pile that is pressed in first will be tilted, making the test results more accurate.

(2)本发明的有机玻璃桩逐根压入后,再与有机玻璃承台组装,而后注入氯仿使之相连,这种方法简单便捷,可以有效避免群桩同时压入耗时大、耗力大等难题。(2) After the plexiglass piles of the present invention are pressed in one by one, they are then assembled with the plexiglass cap, and then injected with chloroform to connect them. This method is simple and convenient, and can effectively avoid time-consuming and labor-intensive pressing of group piles at the same time. Big problem.

(3)本发明的有机玻璃模型组件通过氯仿充分固结在一起,可用于上拔、下压两种试验。(3) The plexiglass model assembly of the present invention is fully consolidated together by chloroform, and can be used for two kinds of tests of pulling up and pressing down.

下面结合附图对本发明作进一步详细描述。The present invention will be described in further detail below in conjunction with the accompanying drawings.

附图说明Description of drawings

图1为本发明用于输电线路基础试验的试验装置的结构俯视图。Fig. 1 is a top view of the structure of the test device used for the basic test of the transmission line according to the present invention.

图2为本发明用于输电线路基础试验的试验装置的正视图。Fig. 2 is a front view of the test device used for the basic test of the transmission line according to the present invention.

图3为本发明用于输电线路基础试验的试验装置承台的剖视图。Fig. 3 is a cross-sectional view of the test device platform used for the foundation test of the transmission line according to the present invention.

图4为本发明用于输电线路基础试验试验装置的设置方法有机玻璃桩的压入顺序图。Fig. 4 is a diagram of the press-in sequence of the plexiglass pile in the setting method of the test device for the foundation test of the transmission line according to the present invention.

图5为本发明用于输电线路基础试验试验装置的设置方法有机玻璃桩与有机玻璃承台的组装示意图。Fig. 5 is a schematic diagram of the assembly of the plexiglass pile and the plexiglass cap of the installation method of the test device for the transmission line foundation test according to the present invention.

图6为本发明用于输电线路基础试验试验装置的设置方法的氯仿注入示意图。Fig. 6 is a schematic diagram of chloroform injection of the installation method of the test device for the basic test of transmission lines according to the present invention.

图7为本发明用于输电线路基础试验试验装置的设置方法的有机玻璃立柱与有机玻璃承台组装示意图。Fig. 7 is a schematic diagram of the assembly of the plexiglass column and the plexiglass platform used in the installation method of the test device for the foundation test of the transmission line according to the present invention.

图8为本发明用于输电线路基础试验试验装置的设置方法注浆后的整体结构示意图。Fig. 8 is a schematic diagram of the overall structure after grouting of the installation method of the test device for the foundation test of the transmission line according to the present invention.

具体实施方式Detailed ways

结合图1~图8:Combined with Figure 1 to Figure 8:

本发明一种用于输电线路基础试验的试验装置,包括有机玻璃承台1、有机玻璃桩2和有机玻璃立柱3;有机玻璃承台1的下端面上设置有与有机玻璃桩2直径配合的预成桩孔5,预成桩孔5与机玻璃承台1的上端面通过预成小孔6连通,机玻璃承台1的上端面设置有与机玻璃立柱3直径配合的预成立柱孔7,有机玻璃桩2与预成桩孔5通过从预成小孔6注入的氯仿固连,机玻璃立柱3与预成立柱孔7通过氯仿固连。The present invention is a kind of test device used for the foundation test of power transmission lines, comprising organic glass cap 1, organic glass pile 2 and organic glass column 3; Prefabricated pile hole 5, the prefabricated pile hole 5 is connected with the upper end surface of the machine glass cap 1 through the preformed small hole 6, and the upper end surface of the machine glass cap 1 is provided with a prefabricated column hole matching the diameter of the machine glass column 3 7. The plexiglass post 2 is connected to the pre-formed post hole 5 through chloroform injected from the pre-formed small hole 6, and the plexiglass column 3 is connected to the pre-formed post hole 7 through chloroform.

有机玻璃立柱3在与其轴向垂直的方向设置有贯穿有机玻璃立柱3的预成加载孔8。The plexiglass column 3 is provided with a preformed loading hole 8 passing through the plexiglass column 3 in a direction perpendicular to its axial direction.

一种用于输电线路基础试验试验装置的设置方法,包括以下步骤:A method for setting up a test device for a transmission line foundation test, comprising the following steps:

步骤一:在模型箱中的泥土4表面根据有机玻璃承台1的位置和有机玻璃承台1下端面设置的与有机玻璃桩2直径配合的预成桩孔5的间距确定有机玻璃桩2的具体位置,然后采用自中间向两个方向对称进行的顺序将有机玻璃桩2逐根压入泥土4中,并预留与预成桩孔5深度相同的长度在泥土4外;Step 1: On the surface of the soil 4 in the model box, determine the distance of the plexiglass pile 2 according to the position of the plexiglass cap 1 and the distance between the prefabricated pile holes 5 matched with the diameter of the plexiglass pile 2 provided on the lower end surface of the plexiglass pile 1. For the specific location, the plexiglass piles 2 are pressed into the soil 4 one by one in a sequence that is carried out symmetrically from the middle to two directions, and the same length as the depth of the prefabricated pile hole 5 is reserved outside the soil 4;

步骤二:全部有机玻璃桩2压入后,将有机玻璃桩2预留在泥土4外的部分与机玻璃承台1下端面的预成桩孔5对应组装;Step 2: After all the plexiglass piles 2 are pressed in, the part of the plexiglass pile 2 reserved outside the soil 4 is correspondingly assembled with the preformed pile hole 5 on the lower end surface of the plexiglass cap 1;

步骤三:通过有机玻璃承台1上连通预成桩孔5和有机玻璃承台1上端面的预成小孔6注入氯仿,让有机玻璃桩2与有机玻璃承台1完全反应并固结成一整体;Step 3: Inject chloroform through the preformed small hole 6 connecting the preformed pile hole 5 on the plexiglass cap 1 and the upper end surface of the plexiglass cap 1, so that the plexiglass pile 2 and the plexiglass cap 1 completely react and consolidate into one overall;

步骤四:在有机玻璃承台1上端面开有的预成立柱孔7内注入氯仿,并快速将有机玻璃立柱3置于预成立柱孔7内,让有机玻璃立柱3与有机玻璃承台1完全反应并固结成一整体;Step 4: Inject chloroform into the pre-established column hole 7 on the upper end surface of the plexiglass cap 1, and quickly place the plexiglass column 3 in the pre-established column hole 7, so that the plexiglass column 3 and the plexiglass cap 1 fully reacted and consolidated into a whole;

步骤五:在有机玻璃承台1下表面和泥土4之间的空隙处注入泥浆,泥浆必须充实在整个空隙内,使有机玻璃承台1和泥土4产生有效的接触面积。Step 5: Inject mud into the gap between the lower surface of the plexiglass cap 1 and the soil 4. The mud must be filled in the entire gap so that the plexiglass cap 1 and the soil 4 have an effective contact area.

实施例:Example:

结合图1~图8:Combined with Figure 1 to Figure 8:

一种用于输电线路基础试验试验装置的设置方法,包括以下步骤:A method for setting up a test device for a transmission line foundation test, comprising the following steps:

步骤一:在模型箱中的泥土4表面根据有机玻璃承台1的位置和有机玻璃承台1下端面设置的与有机玻璃桩2直径配合的预成桩孔5的间距确定有机玻璃桩2的具体位置,然后采用自中间向两个方向对称进行的顺序将有机玻璃桩2逐根压入泥土4中,并预留与预成桩孔5深度相同的长度在泥土4外;如图4所示,以九根有机玻璃桩2为例按照2-1~2-9的顺序依次压入土4中,有效地模拟了实际施工现场逐根打桩的程序。Step 1: On the surface of the soil 4 in the model box, determine the distance of the plexiglass pile 2 according to the position of the plexiglass cap 1 and the distance between the prefabricated pile holes 5 matched with the diameter of the plexiglass pile 2 provided on the lower end surface of the plexiglass pile 1. Concrete position, then adopt the order that proceeds symmetrically from the middle to two directions to press the plexiglass pile 2 into the soil 4 one by one, and reserve the same length as the prefabricated pile hole 5 depth outside the soil 4; as shown in Figure 4 As shown, taking nine plexiglass piles 2 as an example, they are sequentially pressed into the soil 4 in the order of 2-1 to 2-9, effectively simulating the procedure of driving piles one by one in the actual construction site.

步骤二:如图5所示,全部有机玻璃桩2压入后,将有机玻璃桩2预留在泥土4外的部分与机玻璃承台1下端面的预成桩孔5对应组装;Step 2: As shown in Figure 5, after all the plexiglass piles 2 are pressed in, the part of the plexiglass pile 2 reserved outside the soil 4 is correspondingly assembled with the preformed pile hole 5 on the lower end surface of the plexiglass cap 1;

步骤三:如图6所示,通过有机玻璃承台1上连通预成桩孔5和有机玻璃承台1上端面的预成小孔6注入氯仿,让有机玻璃桩2与有机玻璃承台1完全反应并固结成一整体;Step 3: As shown in Figure 6, inject chloroform through the preformed small hole 6 connecting the preformed pile hole 5 on the plexiglass cap 1 and the upper end surface of the plexiglass cap 1, so that the plexiglass pile 2 and the plexiglass cap 1 fully reacted and consolidated into a whole;

步骤四:如图7所示,在有机玻璃承台1上端面开有的预成立柱孔7内注入氯仿,并快速将有机玻璃立柱3置于预成立柱孔7内,让有机玻璃立柱3与有机玻璃承台1完全反应并固结成一整体,此时有机玻璃承台1、有机玻璃桩2和有机玻璃立柱3形成了一个整体;Step 4: As shown in Figure 7, inject chloroform into the pre-set column hole 7 on the upper surface of the plexiglass cap 1, and quickly place the plexiglass column 3 in the pre-set column hole 7, so that the plexiglass column 3 Completely react with the plexiglass cap 1 and consolidate into a whole, at this time the plexiglass cap 1, the plexiglass pile 2 and the plexiglass column 3 form a whole;

步骤五:如图8所示,在有机玻璃承台1下表面和泥土4之间的空隙处注入泥浆,泥浆必须充实在整个空隙内,使有机玻璃承台1和泥土4产生有效的接触面积。Step 5: As shown in Figure 8, inject mud into the gap between the lower surface of the plexiglass cap 1 and the soil 4, the mud must be filled in the entire gap, so that the plexiglass cap 1 and the soil 4 have an effective contact area .

制作完成的用于输电线路基础试验的试验装置如图1和图2所示,其中机玻璃承台1为预加工件,其剖面图如图3所示,有机玻璃承台1的下端面上设置有与有机玻璃桩2直径配合的预成桩孔5,预成桩孔5与机玻璃承台1的上端面通过预成小孔6连通,机玻璃承台1的上端面设置有与机玻璃立柱3直径配合的预成立柱孔7。The completed test device for the basic test of the transmission line is shown in Figure 1 and Figure 2, wherein the organic glass platform 1 is a pre-processed part, and its cross-sectional view is shown in Figure 3, the lower end surface of the organic glass platform 1 A prefabricated pile hole 5 matching the diameter of the plexiglass pile 2 is provided. The prefabricated pile hole 5 communicates with the upper end surface of the machine glass cap 1 through a prefabricated small hole 6. The upper end surface of the machine glass cap 1 is provided with a The pre-set column hole 7 that the glass column 3 diameter matches.

Claims (3)

1., for an experimental rig for transmission line foundation test, it is characterized in that: comprise organic glass cushion cap (1), organic glass stake (2) and organic glass column (3); The lower surface of organic glass cushion cap (1) is provided with the preformation stake holes (5) with organic glass stake (2) diametric fit, preformation stake holes (5) is communicated with by preformation aperture (6) with the upper surface of machine glass cushion cap (1), the upper surface of machine glass cushion cap (1) is provided with the preformation leghole (7) with machine glass columns (3) diametric fit, organic glass stake (2) is connected by the chloroform injected from preformation aperture (6) with preformation stake holes (5), and machine glass columns (3) and preformation leghole (7) are connected by chloroform.
2. the experimental rig for transmission line foundation test according to claim 1, is characterized in that: described organic glass column (3) is provided with in the direction axially vertical with it preformation loading hole (8) running through organic glass column (3).
3., for a method to set up for transmission line foundation test experimental rig, it is characterized in that: comprise the following steps:
Step one: earth (4) surface in model casing arrange according to the position of organic glass cushion cap (1) and organic glass cushion cap (1) lower surface with the particular location of spacing determination organic glass stake (2) of the preformation stake holes (5) of organic glass stake (2) diametric fit, then adopt and from middle order of carrying out to both direction symmetry, organic glass stake (2) is pressed in earth (4) by root, and the reserved length identical with preformation stake holes (5) degree of depth at earth (4) outward;
Step 2: all after organic glass stake (2) press-in, is reserved in organic glass stake (2) that earth (4) part is outward corresponding with the preformation stake holes (5) of machine glass cushion cap (1) lower surface assembles;
Step 3: inject chloroform by the upper preformation aperture (6) being communicated with preformation stake holes (5) and organic glass cushion cap (1) upper surface of organic glass cushion cap (1), allows organic glass stake (2) with organic glass cushion cap (1) complete reaction and consolidation is in aggregates;
Step 4: inject chloroform in the preformation leghole (7) that organic glass cushion cap (1) upper surface has, and fast organic glass column (3) is placed in preformation leghole (7), allow organic glass column (3) and organic glass cushion cap (1) complete reaction consolidation is in aggregates;
Step 5: mud is injected in the gap between organic glass cushion cap (1) soffit and earth (4), mud must enrich in whole space, makes organic glass cushion cap (1) and earth (4) produce effective contact area.
CN201410740963.5A 2014-12-06 2014-12-06 Test device for transmission line foundation test and setting method thereof Active CN104452835B (en)

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CN110607811A (en) * 2019-10-25 2019-12-24 中铁第四勘察设计院集团有限公司 Pile group loading test device and method for simulating high-speed rail bridge operation load

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